A
Only 2
B
Neither 1 nor 2
C
Both 1 and 2
D
Only 1
Correct answer: (c) Both 1 and 2
Explanation
- A
Only 2
Only 2. Plasma-and-cells is also keyed.
- B
Neither 1 nor 2
Neither. Both NCERT lines hold.
- C
Both 1 and 2
Both 1 and 2. Blood = plasma + cells. Haemoglobin makes it look red.
- D
Only 1
Only 1. The haemoglobin limb is also keyed.
Summary. Official key is (c) both. Plasma plus cells; haemoglobin is the red pigment. Also note: Plasma ~55% — Water, proteins, salts; RBC — Haemoglobin; oxygen; WBC / platelets — Defence and clotting; HbFe — Iron in haem.
Same topic · past papers
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